He is best known for his 2016 breakout single "iSpy" (featuring Lil Yachty), which peaked at number 4 on the Billboard Hot 100.

Signed to Indie-Pop and Atlantic Records,[4] Kyle is also known for his association with the SuperDuperCrew which consists of Brick, Jesus, and Maxx.

Kyle has collaborated with artists such as Waywo, Kehlani, Lil Yachty, G-Eazy, Chance the Rapper, Miguel, MadeinTYO, Yuna, and Ty Dolla Sign, among others.

[9][10] Kyle's debut studio album Light of Mine was released in 2018 to positive reviews and reached within the top-30 of the Billboard 200.

[12] Harvey attended Ventura High School[14] and regularly took part in drama classes which helped his confidence largely.

Harvey started rapping when he was about 13 years old[14] and began recording music after hearing Kid Cudi's Man on the Moon: The End of Day.

Kyle's first music video to reach one million views was "Keep It Real", which was accomplished later that year.

[4] In June 2017, Kyle was named as one of the ten 2017 XXL Freshmen along with A Boogie wit da Hoodie, PnB Rock, Playboi Carti, Ugly God, Aminé, MadeinTYO, Kamaiyah, Kap G, and XXXTentacion.